Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Differential - SPICER (DANA) Power-LOK: Description
The Power-Lok differential uses clutch packs, which are preloaded by Belleville spring plates to provide limited slip action.
The torque in the axle causes the pinion shafts to move up ramps on the differential case to increase preload on clutch packs. This varies the amount of torque directed to each wheel, and causes the wheel with the greatest traction to receive the greatest torque. Power-Lok is used on Spicer (Dana) axles that have a 2-piece differential case and 4 differential pinion gears.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.